Freaks Like Us - Katie McGuire, Vampire, #3

Book Four in a series of six fantasy novellas that will forever change the way you think about Vampires, from the author of "Hey, Zeus!" and "Zen and the Art of Dying." When Katie McGuire became a Vampire, she had a choice to make: either join the local clan for protection, or go about her afterlife alone in a world where everyone wanted her dead. It wasn't much of a choice; all the local Vampires creeped her out, including Brian, her ex-boyfriend who went missing shortly after he killed her.
Plus, it would have taken an army of mortals to challenge someone like Brian, which meant that whoever disappeared him was probably another Vampire. She would be better off among mortals. But a local gang was hatching a plan to trap and kill Katie, they were using her best friend as bait, and people were dying just because they looked like her. Eventually Katie would have to choose between sheltering with her own kind and defending the sort of people who would never accept a freak like her.